Abstract: The dynamic performance and portability of mine intrinsically safe detection robot are the premise of whether it is suitable for mine disaster area. In view of the contradiction between enhancing power and reducing quality in the design of power system for mine intrinsically safe detection robot, Creatively put forward the use of distributed power + motor series force to provide power for intrinsically safe detection robot, establish the multi-objective optimization function of the power system design, the optimization goal of system is determined, the decision variables and constraints, and further obtained the mining safety of the motor and the reasonable value range of the battery. Through optimization, the weight of the robot was reduced to 10.8kg, 29% less than the original design. The test results show that the optimized walking speed and obstacle breaking ability of the robot are improved, and the performance parameters meet the design requirements, enhanced the safe detection robot dynamic performance and portability.